diff --git a/gamedata/armordefs.lua b/gamedata/armordefs.lua
index 908d3d6dc61..bd957229756 100644
--- a/gamedata/armordefs.lua
+++ b/gamedata/armordefs.lua
@@ -470,6 +470,8 @@ local armorDefs = {
 		"legnanotcplat",
 	},
 	vtol = {
+		"armhvytrans",
+		"corhvytrans",
 		"raptors3",
 		"armaca",
 		"armca",
diff --git a/units/ArmAircraft/armhvytrans.lua b/units/ArmAircraft/armhvytrans.lua
index 667b2cbb6e1..3f1bd38176f 100644
--- a/units/ArmAircraft/armhvytrans.lua
+++ b/units/ArmAircraft/armhvytrans.lua
@@ -3,10 +3,10 @@ return {
 		maxacc = 0.1,
 		blocking = false,
 		maxdec = 0.75,
-		energycost = 3800,
+		energycost = 4000,
 		metalcost = 190,
 		buildpic = "armhvytrans.DDS",
-		buildtime = 8000,
+		buildtime = 8500,
 		canfly = true,
 		canmove = true,
 		category = "ALL MOBILE WEAPON NOTLAND NOTSUB VTOL NOTSHIP NOTHOVER",
@@ -18,9 +18,9 @@ return {
 		idleautoheal = 5,
 		idletime = 1800,
 		loadingradius = 300,
-		health = 1000,
+		health = 800,
 		maxslope = 10,
-		speed = 100.0,
+		speed = 110.0,
 		maxwaterdepth = 0,
 		objectname = "Units/armhvytrans.s3o",
 		releaseheld = true,
@@ -29,8 +29,7 @@ return {
 		selfdestructas = "mediumExplosionGenericSelfd",
 		sightdistance = 260,
 		transportcapacity = 1,
-		transportmass = 4999,
-		transportsize = 3,
+		transportsize = 4,
 		transportunloadmethod = 0,
 		turninplaceanglelimit = 360,
 		turnrate = 550,
diff --git a/units/CorAircraft/corhvytrans.lua b/units/CorAircraft/corhvytrans.lua
index 6cb6b74291b..bb32d469833 100644
--- a/units/CorAircraft/corhvytrans.lua
+++ b/units/CorAircraft/corhvytrans.lua
@@ -3,10 +3,10 @@ return {
 		maxacc = 0.09,
 		blocking = false,
 		maxdec = 0.75,
-		energycost = 3800,
+		energycost = 4000,
 		metalcost = 190,
 		buildpic = "corhvytrans.DDS",
-		buildtime = 8000,
+		buildtime = 8500,
 		canfly = true,
 		canmove = true,
 		category = "ALL MOBILE WEAPON NOTLAND VTOL NOTSUB NOTSHIP NOTHOVER",
@@ -29,8 +29,7 @@ return {
 		selfdestructas = "mediumExplosionGenericSelfd",
 		sightdistance = 260,
 		transportcapacity = 1,
-		transportmass = 4999,
-		transportsize = 3,
+		transportsize = 4,
 		transportunloadmethod = 0,
 		turninplaceanglelimit = 360,
 		turnrate = 550,